of chicago



BARKING DRUM,

APPLICATIUN FILED JUNE 6. 19m

HERBERT WENSTROM G'UETTLER, 0F CH ICAGO, ILLINOIS, ASSIGNOR T0 AMERICAN BARKING DRUM COMPANY, CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

Specification of Letters Patent.

BAQELKINGr-DRUM.

PatentedJuly 29, 1919.

Application led J une S, 1918. Serial N o. 238,430.

To all whom it may concern:

Be it known that I, HERBERT WnNsTRoM GUETTLER, a subject of theKing of Norway, residing at Chicago, in the county of Cook, State of Illinois, have invented certain new and useful Improvements in Barking- Drums; and I do hereby declare the followlng to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to bark removing machines of the type wherein blocks of wood, from which the bark is to be removed, are tumbled in a rotating drum. The improvements comprising the invention reside in the provision, within the drum, of devices ofisuch a character as to insure tumbling ofthe wood, as opposed to a mere sliding movement, and, at the same time, to effectively prevent brooining or similar injury which is liable to occur when tumbling devices of the usual form are employed.

According to the invention, as preferably carriedinto practice, the drum comprises a plurality of angle bars which extend from end to end thereof and have their llights directed inwardly toward the longitudinal axis of the drinn so as to form the aforementioned tumbling devices.y 'These bars are arranged inv pairs. vW ith their Said flights positioned opposite and in proximity to each other and in parallel relation, the pairs of flights being disclosed suliiciently far apart from one another to provide an 'interrupted or pockcted, instead of a practically smooth, interior surface, and each pair of flights being connected by a guard or cover of 'U-section, which straddles' them and, hence, is likewise disposed' with its 4 rounded base directed toward' the drum axis.

Consequently, when the drum'is inmotion and the tumbling of the Wood takes place,

the'latter action will occasion no injury to the wood by reason of the fact that the ends of the blocks will strike against. therounded guards,instead of against the sharpv edges of the flights of the-angle bars as wouldv otherwise be the case.'

'lio` An 'embodiment of the invention is illus- F ig` 2 is a. transverse section thereof; and

Fig. 3 is an enlarged, fraginental perspec- Y tive view of some of the pairs of angle iron bars and the associated guards.

Referring more particularly to said drawing, the improved drum, generally designated 5, is preferably cylindrical in shape, as shown` and comprises a plurality of angle iron hoops 6, arranged at suitable intervals apart and connected together by bars 7, like- 'wise of angle iron form, which extend from end to end of the drum and, in conjunction with the subsequently-described nruards, constitute the tumbling devices. 'lhese bars 7 are disposed in pairs, iected inwardly toward the longitudinal axis of the drum, the free longitudinal edges of the bases of the adjacent pairs of bars being spaced apart so as to provide slots 8 through which the detached pieces of bark may be discharged from the drum into the tank or the like (not shown) wherein'the drum is mounted. The flights of each pairof bars face each othernand are positioned in conipalatively-close, parallel relation. but the pairs of flights themselves are disposed an appreciable distance apart from one another in order to provide an interrupted, instead of a practically smooth, interior surface, as previously stated, thereby insuring the positive tumbling of the blocks. The interruptions thus formed are in the nature of lcngitudinalpockets which are sulliciently wide to enable them to catch the-corners of the blocks therein during the rotation of the drum, whereby the blocks are positively the bottoms of the pockets.

The drum is supported b f means of devices which alternate with t e'hoops 6 and are here shown as comprising pairs of angle with their Aflights di-A iron hoops 9 arranged with their flights,v

projecting outwardly frofn the drum and disposed opposite and in close proximity Q rings may rest upon or otherwise engage rollers or other supports of any desired charbut instead of the ends of the ted 'as' not involvedl in.y the actual invention. Rotation of the' druni illy-l likewise be effected'in any suitable mi' nner; for instance, by providing at the center of the"A drum a sprocket ring 11 which encircles said drum and is designed for engagement with driving gearing (not shown). which in turn, is drivenfrom a suitable source of power, the said sprocket ring being mounted between the out-turned flights of a pair of angle iron hoops 12.

The devices for tumbling the blocks of wood comprise the pairs of angle iron bars 7 and their associated guards, as previously stated. lThe latter, which .are indicated at 13, are in the form of U-shaped or troughacter, illustration of this feature being omitlike members which straddle the -flights of the bars and have their legs'projecting across the outer faces thereof, the iiights and guards being co-eXtensive -in length and fastened together at intervals by rivets 14, the central portions of which pass through spacing sleeves 15 disposed between the flights. The rounded'bases. of the guards are likewise directed toward the axis of the drum, as will be understood; and since thev guards lit over the pairs of iiights, the veffect produced is that of utilizing tumbling devices having closed or solid edge faces which are rounded along theirA edges.

The spacing of the tumbling devices insures their effecting the necessary tumbling action, .as above explained, as'v from a mere sliding movementof the blocks;

blocks striking against the sharp edges of the iights of the angle bars duri-ng their tumbling l movements and being split or brooxned thereby, they will hit only the rounded bases of the guards and will be uninjured in conseuence. `Further description of the invention, its mode of operation, and its advantages, is deemed unnecessary in ,view of the foregoing, and is, accordingly, omitted'v but it may he stated that while the preferre 'embodiment of the invention is disclosed herein, no limitation to the precise structural 'details of such disclosurel is iutendedhsmce modifications and changes with relation to the improved tumbling devices may wellbe made within the scope of the invention as claimed and the said devices may be used in other and different types of drums.

I claim as my invention:

1. In abarking apparatus, a hollow, rotatable container for the-blocks, having'av plurality of tumbling devices of substantially the angle bars 7. The

distinguished.

the container and are disposed U-section, the rounded bases of which are directed inwardly 'toward the center of the container; lsaid devices being spaced apart an appreciable distance from one another so as tcform pockets between them adapted to catch the corners of the Iblocks therein 'during the rotation ofthe container and thereby positively force said blocks to travel partway around with said container. 1

2. In a barking a paratus,- a rotatable drum to contain the b ocks, provided with a plurality of interiorly-located, longitudi` nally-arranged tumbling devices having .rounded edge faces, said devices projecting toward the axis of the drum in substantially parallel relation to one another and being spaced apart an appreciable distance so as to form longitudinal pockets between them adapted to catch the corners of the blocks therein during the rotation of, the drum and thereby positlvely force said blocks to travel partway around with said drum.

3. In a barking apparatus, a hollow-rotatable container for the blocks, having a plurality of longitudinally-arranged tumbling devices, whichare spaced apart. an appreciable distance from one another so as to provide an interrupted tumbling surface within the container, each tumbling device comprising a pair of angle bars, the flights of which are directed inwardly of the container `and are disposed in s aced, parallel relation, and a U-shaped guar s traddling said flights and fastened, thereto.

4. In a barking apparatus, a hollow, rotatable container for the blocks, having secured within it a plurality of longitudinallyarranged tumbling devices, which are spaced apart an appreciable distance from one another so as t0 provide an interrupted tumbling surf'ace within the container, each tumbling device comprising a. pair of angle bars, the flights of which are directed inwardly ot. the container'and are disposed in spaced, parallel relation, and protecting means attached to each tumbling device for preventing the blocks from striking against the edges of said flights.

5. In abarking a paratus,al1ollow rotatable container for t e blocks, havingsecured within it a plurality of longitudinally-arranged' tumbling devices, which are spaced apart an appreciable distance from one another so as to provide an interrupted tumbling surface within the container, each tumbling device comprising a pair of angle bars, the flights of which are directed inwardly of in spaced, par-v allel relation, and protecting means attached to each tumbling device and bridging the space between the flights thereof for preventing` the blocks from striking against the edges of saidflights. f

ln 'a barking apparatus,a rotatable, cylind ical container for'the blocks, having a.

CFI

'substantial-li of which a wafdy mwwrd the axis of the deviess being spaced apart @ne another, so

devmes of mande-d bases gudal pockets b mmh "o e @orgels of tween the bloc ai'zeanged @um y U-section, the re' direeted incontaina; said an appreciable as t@ fmsm 1onthem adapd bo .ks therein during the rotaon of 'the conminer and thereby positively force said blocks to trave partwuy around with said container, said pockets having thai:- bottom walls provided mth longitudina barili-discharging slots which are disposed medaly thereof.

n testimony whereof I affix my signature. l5 f vHmmm WENSTROM GUETTLER. 

